Oil burner



June 4, 1935. w. MJESTERLING OIL BURNER Filed Aug. '7, 1931 PatentedJune 4, 1935 UNITED STATES PATENT OFFICE 011. BURNER Application August7, 1931, Serial No. 555,672

3 Claims. -(Cl. 299-131) This invention relates to a burner, and relatesmore particularly to a fluid fuel burner for use on a boiler, or thelike. It is a general object of the present invention to provide asimple, practical, and effective burner of the general characterreferred to.

Another object of the invention is to provide a burner for handling afluid fuel, such as oil, at high pressures. v

, It is another object of the invention to provide a burner embodyingmeans for heating the fuel before it is discharged from thenozzle.

Another object of the invention is to provide a burner of the charactermentioned that operates to discharge the fuel in a comically-shapedstream and in an atomized condition.

It is a further object of the invention to provide a burner of thecharacter mentioned that may be easily and quickly altered or convertedfor installation by cutting only a rod and a pipe.

Another object of the invention is to provide a burner of the charactermentioned that may be readily adjusted or regulated to properly handlethe fuel at difierent pressures, etc., and to discharge the fuel in thedesired manner and in the desired quantities.

' A further object of the invention is to provide a burner of thegeneral character mentioned that .is particularly simple and inexpensiveof manufacture.

.Other objects and features of the invention will be best and more fullyunderstood from the following detailed description of a typical formand. application of the invention, throughout which descriptionreference will be had to the accompanying drawing, in which:

Fig. 1 is a side elevation of the burner provided by this invention.Fig. .2 is an enlarged longitudinal detailed sectional view of thedevice, and

Fig. 3 is an enlarged transverse detailed sectional view taken asindicated by line 3-3 v on Fig. 2.

The burner provided by my present invention includes, generally, a bodyI0, an extension II p on the body carrying a nozzle head I2, means I3tral longitudinal opening I5 extends completely through the body fromone end to the other. The body opening I5 has portions of variousdiameters, as will be hereinafter described.

A lateral fuel inlet port I6 communicates with closed in the drawing thepacking means for sealing about the fuel conduit includes a body I9 ofpacking arranged against the end of the boss I1 and surrounding theconduit I8, and a gland or follower '26 screw threaded on the boss I! tocompress thep'acking. V

The body extension I I is provided to carry the nozzle head IZand todeliver or pass fuel to the nozzle head. Further, the extension IIoperates to support theheating means I4, as will be hereinafterdescribed. I

In accordance with the preferred form of the invention, the extension I]is in the nature of a simple length of pipe or tubing. The extension IImay be of any suitable length, depending upon the use or application ofthe burner. It is preferred .to initially form the extension IIcomparatively long so that it may be shortened team '1 desired lengthwhen the burner is installed.- It is a feature of the invention that theextension II has a detachable connection with the body III.

The outer end of the extension II is screw threaded into a socket 2| inthe inner end of the body ID. The opening 22 in the extension IIexstruction the'nozzle head I2 is detachably screw threaded to theextension; case illustrated in the drawing the nozzle head I2 isprovided with a screw threaded socket 23 to receive the end of theextension II. The head I2 is provided with a centrallongitudinalopening'24 to discharge the fuel. The opening His In theparticular of considerably less diameter than the opening 0 '22 of theextension, and its outer end portion 25 is restricted or reducedindiameter. The outer end portion of the nozzle opening isround in crosssection and is rather short, and-its walls are flared or outwardlydivergent.

The nozzle head I2 may be suitably shaped, for example, it may have anoutwardly convergent exterior and a flat outer end.

The means i3 is manually operable or adjustable to control thedischargeof fuel from the nozzle [2 and operates to cause the atomization of thefuel as it is discharged from the nozzle. The control means l3 includesa fiow controlling member or control head 26, a stem 21 carrying thehead 26, and means 28 for operating the stem 21. The control head 26 isdisposed .within the restricted portion 25 of the nozzle opening andoperates to cause the breaking up or atomizing of the fuel as it isdischarged from the nozzle under pressure. The control head 26 includesa main ,portion or body 23. The body 29 of the control head isfrusto-conical, having outwardly divergent walls pitched at the sameangle as the walls of the nozzle opening 25. The body 29 of the controlhead is proportioned so that it may-effectively seat against orcooperatewith the walls .of the opening 25 under certain operatingconditions.

of the control-head 26 to facilitate the mounting and removal of thecontrol head.

The stem 21 is an elongated rod extending through the extension II andinto the body I0. The stem 27 is round in cross sectional configurationand is movable longitudinally by the means 28. An end portion of thestem 2'! is slidable in the opening24 of the nozzle head. The opening 24operates to slidably guide and center the stem. A screw threaded opening32 is provided in the end of the stem 21 to receive the screw of thecontrol head. The end portion of the stem 2'! extending into the nozzleopening .24 is fluted or provided with spaced longitudinal grooves 33.The grooves 33 are provided to. pass the fuel from the opening 22 of theextension .to discharge through the nozzle head. The stem 21 extendsthrough the body opening l5 and is slidably guided and centered by areduced portion 33 of the body "opening. It is to be noted that theopenings 24 and 33 operate to slidably support the stem 2'! atlongitudinally spaced points so I that it is effectively centered andguided.

I The means 28 for operating or shifting the stem 21 includes anoperating member 34 extending into an opening 35 in the body If). 'A pin36 is provided on the operating member 34 and is screw threaded into thebody opening. Asuitable hand wheel or disc-shaped enlargement 31 isprovided on the outer end of the operating member 34 to facilitate themanual turning or operation of the member, The stem 21 extends through acentral longitudinal opening 38 in the operating member 34. The stem 21is freely rotatable in the opening 38. The stem .21 is connected withthe operating member 34 so as to move longitudinally together with theoperating member. The outer end portion of the opening 38 is of en- 40is threaded into the outer end of the opening 38 and engages the end ofthe stem. 21 to retain the collar 39 against the outwardly-facingshoulder 4|. It will be apparent how operation or threading of theoperating member 34 causes longitudinal movement of the stem 27. Thestem 21 may not turn or rotate during operationof the member 28, as thestem is rotatably carried in the opening 38.

The invention includes means for sealing about the stem operating member34. Packing 42 is arranged in a socket in the end of the body andsurrounds the member 34. A follower 43 surrounds the member 34 andengages the packing 42. A gland or cap 44 is screw threaded onto the endof the body I0 and engages the follower 43 to force it against thepacking 42.

The heating means I4 is operable to heat the fuel during its passagethrough the body extension ll, so that it may have the desired fluiditywhen discharged from the burner. Warming or heating of the fuel duringits passage through the extension ll renders it more fluid, so that itis effectively broken up or atomized when discharged from the nozzle. Aplurality of heating units 45 are arranged on the extension H. The

units 45 are annular or tubular structures, each including a shell 46, aheating element 41 within the shell, and suitable insulating material 48encasing the heating element. The several heating units 45 are alike orsimilar in construction and are removably retained on the extension I I.There may be any suitable number of heating units 46, there being fourunits in the specific embodiment of the invention illustrated in thedrawings. The several heating units 45 may be separate or individualdevices and may be electrically connected by suitable connections 49.The heating units 45 are clamped between the inner end of the body l6and the nozzle head l2. Spacers 50 may be arranged between the severalheating units 45. It will be apparent how the heating the control head26 may be set or adjusted to provide for the desired discharge of thefuel. The burner may be operated at pressures in the neighborhood of2000 pounds per square inch. The operating member 28 maybe manuallyoperated to set the control head 26 in any desired position. Where thefuel is handled at very high pressures, the body 29 of the control headmay be seated against the walls of the opening 25. Theseat- 'ing of thebody 29 0f the control head in the nozzle opening may be hand-tight,that is, the oper-- ating member 28 may be manually operated to seat thehead 26 in the opening with the desired force. The fuel under pressuretends to stretch or elongate the control head 26 and issues from betweenthe head 26 and the walls of the opening 25 in an extremely fine spray.It is to be understood that the control head 26 may be set in anydesired or suitable position, depending upon the character of the fuel,the'pressure under which the fuel is handled, etc. The heating .units 45operate to warm or heat the fuel during its'passage through the burnerso that it is made more fluid to be readily broken up when dischargedfrom the nozzle head I2. The burnermay be readily adapted for anyparticular installation, as the extension l [and the rod 21 may be cutto the desired sizes to suit theburner for any particular situation. Thedetachable extension I l and the stem 21 may be cut and fitted duringthe installation of the burner. If the extension II is shortened whenthe burner is installed, it is only necessary to cut threads on its endso that it may be attached to the body It). If the stem 21 is shortened,the collar 39 is fixed on the end of the stem so that the stem carriesthe control head 26 in the desired position. The present inventionprovides a burner that is particularly simple and inexpensive ofmanufacture and a burner that is readily capable of installation invarious situations.

Having described only a typical preferred form I of my invention, I donot wish to limit myself to the specific details set forth, but wish toreserve to myself any changes or variations that may appear to thoseskilled in the art or fall within the scope of the following claims.

Having described my invention, I claim:

1. In a device of the character described, a body having an opening, anoil inlet communicating with the opening, a tubular member threaded intothe opening and having a socket in its outer end, the inner end of thesocket forming a shoulder, a flow controlling stem rotatably passingthrough the tubular member for controlling the discharge from theopening, a collar on the stem in the socket, a plug threaded into thesocket, the shoulder and plug cooperating with the collar whereby thestem is movable longitudinally with the member, and a handle on themember whereby the member may be threaded into and out of the body tooperate the stem longitudinally.

2. An oil burner including a body having a longitudinal passage, an oilinlet communicating with said passage, a stem shiftably guided in saidpassage, a valve head threadedly connected with the stem for cooperatingwith said passage, rotatable means for longitudinally shifting the stemand controlling the discharge from said passage, and a swivel connectionbetween the stem and said means allowing relative rotation.

, 3. An oil burner including a body having a longitudinal passage, anoil inlet communicating with said passage, a nozzle on the end of thebody in register with said passage, a stem arranged in said passage,having one end shiftably guided WILLIAM M. ES'I'ERLING.

